Overclock.net › Forums › AMD › AMD CPUs › What Exactly is VID
New Posts  All Forums:Forum Nav:

What Exactly is VID

post #1 of 17
Thread Starter 
Hey guys, I haven't been trying to overclock lately and only ever ran my pc at 4.0ghz. 4.4ghz once and it was just a random voltage I picked. I was wondering if anyone could help me understand what exactly VID is and how it effects my CPU. 1090t (1.275 VID).
Thanks !

Temps also max at 38 Celsius on AMD overdrive which is supposed to account for the offset, do I have a lot of safe OC headroom left?
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
post #2 of 17
its teh stock voltage at what your specific processor is set to run at stock speed. Usually the lower the vid the better as they oc better. But lower vid= more heat when ocd.
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 2 555 gigabyte 790xta ud4p 8800gtx sli vmod 4 gigs 1600 ridgeback 6-8-6-24 
Hard DriveCoolingPowerCase
ocz vertex 2  Custom loop.  950 watt rosewill ;p Nzxt nemesis modded to hell and back 
  hide details  
Reply
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 2 555 gigabyte 790xta ud4p 8800gtx sli vmod 4 gigs 1600 ridgeback 6-8-6-24 
Hard DriveCoolingPowerCase
ocz vertex 2  Custom loop.  950 watt rosewill ;p Nzxt nemesis modded to hell and back 
  hide details  
Reply
post #3 of 17
Thread Starter 
How exactly would a lower VID result in more heat, just curious. I can't really find much information on average 1090t VIDs.
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
post #4 of 17
Quote:
Originally Posted by tehPwnzah View Post
But lower vid= more heat when ocd.
What?
Slave
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770k Asus Maximus Gene V iGPU HD 4000 16GB DDR3 Crucial Ballistix 1600 Mhz 
OSMonitorKeyboardPower
W7 x64 Dell U2412M Filco Majestouch 2 BeQuiet! Dark Power Pro 750w 
Case
Open on the desk lol 
  hide details  
Reply
Slave
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770k Asus Maximus Gene V iGPU HD 4000 16GB DDR3 Crucial Ballistix 1600 Mhz 
OSMonitorKeyboardPower
W7 x64 Dell U2412M Filco Majestouch 2 BeQuiet! Dark Power Pro 750w 
Case
Open on the desk lol 
  hide details  
Reply
post #5 of 17
Thread Starter 
Well the reason I'm curious was that if it a good chip I'm going to order a custom CPU loop. 1.35 VID seems to be the average, Anyone with a 1090 able to contribute?
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
post #6 of 17
Quote:
Originally Posted by tehPwnzah View Post
Usually the lower the vid the better as they oc better. But lower vid= more heat when ocd.
.... I fail to see the logic there.

Without going into a big physics discussion a lower Voltage (or "push") shouldn't generate MORE heat it should generate LESS. Otherwise my laptop CPU should have burned out by now since it's sitting at 0.15V lower than stock.

Some terms (I'll use RC car examples because that's what I know, EDIT: Sorry those are bad examples edited for better ones):

Voltage: "push" or how "hard" energy can be forced through the conductor (basically from the battery how hard it can push energy through the to the motor in an RC car. It's also slightly affected by amperage of the pack and "Coulombs" and also the battery chemistry)
Amperage: "juice" or how much current you have available to power your electronics (which is why a 3000mAh battery will last longer than a 1500mAh battery on an RC car assuming exact same use/discharge scenarios) Note, that technically you can't measure how much amperage is in a battery pack without some weird setup but you can get a rough idea of how much juice there is left based on a voltage reading.
Wattage: How much work can be done for a given period of time (1 "Watt" = 1 Joule(s)/second)

So what can we do with these? Remember high school physics, P=VI (As Voltage approaches 0 Power should theoretically approach 0 given a constant current/amperage) therefore by lowering your VID (BTW: VID= Voltage IDentifier or something like that) you lower power consumption and also heat generated BUT you also introduce some instability which is why when you undervolt your system by any large amount you also need to underclock it to keep it stable (stock voltage is set high enough that it's guaranteed to be stable).

I also don't want to go into the whole digital circuit/discrete electronics thing but just remember that the higher the "differences" in voltage are the more "robust" a circuit is. ie. If you have (in a 5Volt system (like using 74 series logic IC's)), 0 translating into a voltage of 0-2.4V and 1 translating to a voltage of 2.5-5V then you have a larger "margin of error" before you get errors and such. Bring that down to 2V and for 0 you only get a range of 0-.9V and 1 a range of 1-2V. If you get Vdrops or other interference then you get errors. So that's why undervolting can give you instability.

In fact, funny story. I was trying to build a machine using a protoboard/breadboard and my design was quite convoluted. It worked but only up to a certain point because there was too much voltage being lost somewhere and once it hit a certain step would stop working (and this was being fed 5Volts). I eventually swapped out the wires for lower resistance ones and kind of cheated a bit by feeding a "fresh" 5V wire at a point where I knew for sure that 5V should be being fed but that's why low voltages can induce instability.

PS: .... That's a golden chip if I ever saw one. 4Ghz @1.275.... Don't people usually have to push it up to 1.3-1.4-ish?
Edited by Amor - 3/9/11 at 12:01am
GISX-R
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 ASUS P6TD Deluxe XFX HD6870 1GB Corsair 6GB DDR3-1600 (9-9-9-24) 
Hard DriveOptical DriveOSKeyboard
Crucial M4 64GB LG 24X SATA DVD-RW Windows 7 Ultimate Logitech G15 
PowerCaseMouse
620W Antec High Current Gamer Lian Li K58W MS OEM 
  hide details  
Reply
GISX-R
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 ASUS P6TD Deluxe XFX HD6870 1GB Corsair 6GB DDR3-1600 (9-9-9-24) 
Hard DriveOptical DriveOSKeyboard
Crucial M4 64GB LG 24X SATA DVD-RW Windows 7 Ultimate Logitech G15 
PowerCaseMouse
620W Antec High Current Gamer Lian Li K58W MS OEM 
  hide details  
Reply
post #7 of 17
Thread Starter 
Thanks! That was really helpful, does a CPU with a lower VID have a better chance at being stable at high clocks/voltages or does that taper off after we go above stock voltage?
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
post #8 of 17
Quote:
Originally Posted by Vap0r87 View Post
Thanks! That was really helpful, does a CPU with a lower VID have a better chance at being stable at high clocks/voltages or does that taper off after we go above stock voltage?
You might find this useful, there was a big ol thread about VID months ago:

http://www.overclock.net/intel-cpus/...explained.html

EDIT: I know its under intel but ignore that, except for the vcore ranges.
Edited by ocpokey - 3/8/11 at 1:37pm
Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
  hide details  
Reply
Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
  hide details  
Reply
post #9 of 17
Thread Starter 
I'm just full of questions today. Is it any way possible for a 1090t to be @ 4ghz on 1.275 volts? That's what cpu-z is validating and showing (v1.57). I think it must be bugged out.
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
Robit
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090t ASUS Crosshair IV Formula MSI 6870 G.Skill Ripjaws 4GB DDR3 @ 1800mhz 
Hard DriveOptical DriveOSKeyboard
OCZ Agility 60GB, WD Caviar Black 1TB ASUS Black 2MB Cache DVD Burner Windows 7 Ultimate 64bit Logitech G15 
PowerCaseMouse
Kingwin Lazer 1000W Modular 80 Plus Active PFC Cooler Master Storm Scout Razer Copperhead / Microsoft Siderwinder 
  hide details  
Reply
post #10 of 17
Quote:
Originally Posted by Vap0r87 View Post
Thanks! That was really helpful, does a CPU with a lower VID have a better chance at being stable at high clocks/voltages or does that taper off after we go above stock voltage?
Yes it does. The good thing about having a lower VID is that your CPU needs less voltage to be stable at any given frequency. So if your VID 1.25 for stock voltage that means it is stable at that frequency with only 1.25v. If your VID is 1.35 then it means your CPU needs more voltage for that same stock frequency. In the end the lower your vid then usually it means you can get a higher overclock as it will need less voltage to attain a higher overclock as opposed to a chip that has a higher vid which will need more voltage to attain that same overclock.

Lower VID = Needs less voltage to be stable at that frequency
Higher VID = Needs more voltage to be stable at that frequency

Lower VID CPU@1.5v = 5.0ghz (total guess used as an example)
Higher VID CPU@1.5v = 4.5ghz (again a total guess being used as an example)
Blue Steel
(20 items)
 
HTPC
(12 items)
 
Macbook
(13 items)
 
CPUMotherboardGraphicsRAM
i7 860 MSI P55-GD80 Gigabyte GTX 560Ti 1gb Kingston Hyper X Fury 4x4gb 
Hard DriveHard DriveHard DriveHard Drive
Samsung F3 1tb Samsung 830 64Gb Western Digital Green 1tb Samsung 850 EVO 500gb 
Optical DriveCoolingOSMonitor
Lite-On Blu-Ray Player Cooler Master Hyper 212+ Windows 7 Home Premium x64 Acer S231HLBID 23" 
MonitorKeyboardPowerCase
Vizio 32" 1080P Razer BlackWidow Rocketfish 900W HAF 912 
MouseMouse PadAudio
Logitech G402 Hyperion Steel Series QcK Asus Xonar DG 
CPUMotherboardGraphicsRAM
i5 760 Asus P7P55D-E Pro XFX 5570 Corsair XMS3 2x1gb 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 640Gb HP DVD1260 Cooler Master GeminII S524 Windows 7 Enterprise x64 
MonitorPowerCaseMouse
Vizio 32" 1080 Corsair 650TX Silverstone LC13B-E Droid X2 
CPUGraphicsRAMHard Drive
2.4 GHz Intel Core 2 Duo GMA X3100 4GB DDR2 667 MHz 120 GB 
Optical DriveOSMonitorCase
MATSHITADVD-R UJ-867 Mac OS X 13 Macbook 
Mouse
Microsoft Arc 
  hide details  
Reply
Blue Steel
(20 items)
 
HTPC
(12 items)
 
Macbook
(13 items)
 
CPUMotherboardGraphicsRAM
i7 860 MSI P55-GD80 Gigabyte GTX 560Ti 1gb Kingston Hyper X Fury 4x4gb 
Hard DriveHard DriveHard DriveHard Drive
Samsung F3 1tb Samsung 830 64Gb Western Digital Green 1tb Samsung 850 EVO 500gb 
Optical DriveCoolingOSMonitor
Lite-On Blu-Ray Player Cooler Master Hyper 212+ Windows 7 Home Premium x64 Acer S231HLBID 23" 
MonitorKeyboardPowerCase
Vizio 32" 1080P Razer BlackWidow Rocketfish 900W HAF 912 
MouseMouse PadAudio
Logitech G402 Hyperion Steel Series QcK Asus Xonar DG 
CPUMotherboardGraphicsRAM
i5 760 Asus P7P55D-E Pro XFX 5570 Corsair XMS3 2x1gb 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 640Gb HP DVD1260 Cooler Master GeminII S524 Windows 7 Enterprise x64 
MonitorPowerCaseMouse
Vizio 32" 1080 Corsair 650TX Silverstone LC13B-E Droid X2 
CPUGraphicsRAMHard Drive
2.4 GHz Intel Core 2 Duo GMA X3100 4GB DDR2 667 MHz 120 GB 
Optical DriveOSMonitorCase
MATSHITADVD-R UJ-867 Mac OS X 13 Macbook 
Mouse
Microsoft Arc 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › What Exactly is VID